[Bug 762030] New: 100% CPU usage with Epiphany

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=762030

            Bug ID: 762030
           Summary: 100% CPU usage with Epiphany
    Classification: Platform
           Product: GStreamer
           Version: 1.4.4
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gstreamer (core)
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: agomez at igalia.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

Created attachment 321110
  --> https://bugzilla.gnome.org/attachment.cgi?id=321110&action=edit
BT from gdb, when manually stopping during the 100% CPU usage.

I'm using WebKitGtk+ with my own JHBuild setting:
https://github.com/tanty/jhbuild-epiphany/tree/master

Epiphany 3.18.0, WebKit 2.10.7 and gstreamer-1.4.4

I'm running Epiphany with the dconf key:

"process-model" = "shared-secondary-process"

The compilation was done with CMake args:

'-DPORT=GTK -DCMAKE_BUILD_TYPE=Release -DENABLE_MINIBROWSER=ON
-DCMAKE_C_FLAGS_RELEASE="-O0 -g1 -DNDEBUG -DG_DEBUG=fatal-criticals
-DG_DISABLE_CAST_CHECKS" -DCMAKE_CXX_FLAGS_RELEASE="-O0 -g1 -DNDEBUG
-DG_DEBUG=fatal-criticals -DG_DISABLE_CAST_CHECKS"'

---

Running Epiphany with env variable: GST_DEBUG_FILE=./gst.log GST_DEBUG=3 

When visiting several pages, eventually, epiphany freezes and the CPU goes to a
100%

This bug is not reproducible in a predictable way.

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